Finally abstracted constants properly. Changed how the event module works; wasn't really abstract before. Removed libs we're not going to use: native, signal.

src/modules/event/sdl/wrap_Event.h

@@ -34,7 +34,6 @@ namespace sdl
 	int w_pump(lua_State * L);
 	int w_poll(lua_State * L);
 	int w_wait(lua_State * L);
-	int w_quit(lua_State * L);
 	int w_push(lua_State * L);
 
 	extern "C" LOVE_EXPORT int luaopen_love_event(lua_State * L);